Contents: Introduction: Jewish roots for natural nutrition -- The nutrients and their importance -- Weight= energy (a few words on desirable weight) -- The carbohydrates: source of energy -- Fats: storehouse of energy -- Protein: structure of the body -- Vitamins -- Minerals -- Fluid -- Eating well: applied principles: general guidelines -- Natural cooking -- Seasoning with herbs and spices -- Spiritual effects of eating -- Tu b"Shevat: festival of the trees -- The apple: symbol of health -- About calories -- Avoiding a heart attack -- What is a nutritionist?